Equations (1) and (2) describe the momentum balance of the drift ice in the cases
of steady plane and axially symmetric drift. Here, σ xx , σ yy , and σ xy are the components of ice stresses in the Cartesian coordinates x and y; σ rr , σ θθ , and σ rθ are the
components of ice stresses in polar coordinates r and θ; v y and v θ are the ycomponent and angular component of ice drift velocity, ρ i and h are the density and
the thickness of the ice cover, f is the Coriolis parameter; η x and η r are the sea
surface tilts in the Cartesian and polar coordinates, F x, y and F r, θ are the components
of the drag forces applied to the ice by wind and water. It is assumed that sea
surface tilts in y and θ-directions are small. Therefore, they are not included in
Eqs. (1) and (2).
The Coriolis parameter is greater than zero f > 0 in the Northern Hemisphere. It
is assumed that in the Northern Hemisphere positive direction of the y-axis is
Fig. 3 Research Vessel “Lance” near the shear zone at the east coast of Edgøya; May 2, 2016
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